DRIVER CLEAN

I splashed out and am about to replace my old GEForce2 with a T4200 128MB. I need to clean out my old drivers as I want to install the latest 43.45 drivers from NVidia. Hasn't been successful using the add/remove software in Windows XP control panel as the installation wizard for the new drivers keeps telling me there are components of the old drivers left. Any of you folks know how I clean it out successfully.
My other question is, at some stage after the clean the machine asks you to reboot..if I do that driverless, am I going to be thrown into limbo??????
I am also getting a RUNDLL error on booting saying 'Error loading NvQTwk'.....any suggestions?
My other question is, at some stage after the clean the machine asks you to reboot..if I do that driverless, am I going to be thrown into limbo??????
I am also getting a RUNDLL error on booting saying 'Error loading NvQTwk'.....any suggestions?